H3C Technologies H3C SecPath F1000-E - Manual (Page 164)

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NOTE:
•
No destination address needs to be configured for a 6to4 tunnel because the destination address can
automatically be obtained from the IPv4 address embedded in the 6to4 IPv6 address.
• To encapsulate and forward IPv6 packets whose destination address does not belong to the subnet
where the receiving tunnel interface resides, you need to configure a static route to reach the destination
IPv6 address through this tunnel interface on the device. Because automatic tunnels do not support
dynamic routing, you can configure a static route to that destination IPv6 address with this tunnel
interface as the outbound interface or the peer tunnel interface address as the next hop. A similar
configuration needs to be performed at the other tunnel end. For the detailed configuration, see
IPv6
Static Routing Configuration in the IP Routing Volume.
• The automatic tunnel interfaces using the same encapsulation protocol cannot share the same source IP
address.
6to4 Tunnel Configuration Example
Network requirements
As shown in Figure 9 , two 6to4 networks are connected to an IPv4 network through two 6to4 devices
(Device A and Device B) respectively. Configure a 6to4 tunnel to make Host A and Host B reachable to
each other.
To enable communication between 6to4 networks, you need to configure 6to4 addresses for 6to4
devices and hosts in the 6to4 networks.
• The IPv4 address of GigabitEthernet 1/2 on Device A is 2.1.1.1/24, and the corresponding 6to4
prefix is 2002:0201:0101::/48 after it is translated to an IPv6 address. Assign interface tunnel 0 to
subnet 2002:0201:0101::/64 and GigabitEthernet 1/1 to subnet 2002:0201:0101:1::/64.
• The IPv4 address of GigabitEthernet 1/2 on Device B is 5.1.1.1/24, and the corresponding 6to4
prefix is 2002:0501:0101::/48 after it is translated to an IPv6 address. Assign interface tunnel 0 to
subnet 2002:0501:0101::/64 and GigabitEthernet 1/1 to subnet 2002:0501:0101:1::/64.
Figure 9 Network diagram for a 6to4 tunnel
GE1/2
2.1.1.1/24 GE1/2
5.1.1.1/24
GE1/1
2002:0201:0101:1::1/64
GE1/1
2002:0501:0101:1::1/64
Device A Device B
6to4 device
Host A
2002:0201:0101:1::2/64
Host B
2002:0501:0101:1::2/64
6to4
Group 1
IPv4 netwok
6to4 device
6to4
Group 2
Tunnel 0
2002:0201:0101::1/64 Tunnel 0
2002:0501:0101::1/64
Configuration procedure
NOTE:
Make sure that Device A and Device B are reachable to each other.